WO2011085524A1 - Energy saving fan - Google Patents

Abstract

An energy saving fan includes a pallet (1), a hub (2) connected together with the pallet (1) and a plurality of curved surface shaped blades (3) radially extending outward from the hub (2). The roots (31) of the adjacent blades (3) are connected together by a curved surface shaped connecting part (32) extending from the trailing edge (33) of a former blade to the leading edge (34) of a latter blade. A first reinforced rib (41) is formed on the windward surface (35) of each blade (3) from a trailing edge corner (331) to the hub (2), a second reinforced rib (42) is formed on the leeward surface (36) of each blade (3) from a leading edge corner (341) to the hub (2), and a third reinforced rib (43) is formed on the leeward surface (36) of each blade (3) from the hub (2) to the trailing edge (33). These reinforced ribs improve the strength of the blade roots and prolong the service life of the blades.

Description

 Energy saving fan

 The utility model relates to a cooling fan, in particular to a fan in an automobile cooling system.

 Background technique

 The cooling fan in the prior art generally consists of a pallet, a hub and a blade. The hub and the blade are generally integrally molded. In order to save material, the thickness of the hub is reduced as much as possible, and the hub is made thinner. When the large blade is connected to the hub, the root of the blade needs to be twisted and connected to the hub, but this structure easily causes the blade root to break. In order to increase the strength of the connection between the blade and the hub, some solutions have appeared in the prior art. For example, the patent application No. WO 2008/141253 A1, published on Nov. 20, 2008, discloses a fan mechanism including a hub assembly, a plurality of blade elements extending radially outward from the hub, a plurality of spirals The distributed triangular piece has a number of triangles corresponding to the number of blades, and each of the triangular pieces extends from a hub adjacent to one blade to a trailing edge of an adjacent blade. The technical solution enhances the connection strength between the blade and the hub by providing a triangular piece. Although the triangular piece can increase the connection strength of the blade, the connection structure is liable to cause stress concentration, thereby reducing the strength of the blade and making the blade susceptible to breakage. At the same time, this structure will also reduce the air volume and efficiency of the fan blades. Utility model content

 The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art described above, and to provide an efficient energy-saving fan that has high strength, low flow energy loss, high fan efficiency, and low cost.

An energy efficient cost reducing fan according to the present invention includes a pallet, a hub coupled to the pallet, and a plurality of curved surfaces extending radially outward from the hub a blade, the roots of the adjacent blades are connected together by a curved connecting portion, and the connecting portion is formed by a trailing edge of the preceding blade extending toward a leading edge of the latter blade, and the windward surface of each of the blades Forming a first reinforcing rib from a corner of the trailing edge to the hub, the leeward side of each of the blades is formed with a second reinforcing rib from a corner of the leading edge to the hub, the leeward surface of each of the blades A third reinforcing rib is formed from the hub toward the trailing edge.

 According to the utility model, an efficient and energy-saving fan has the following subsidiary technical features:

 The first reinforcing rib is coupled to the hub along a direction before the trailing edge of the blade at a corner.

 The second reinforcing rib is coupled to the hub along a front edge of the blade before the corner.

 A connection point of the third reinforcing rib to the hub is adjacent to a leading edge of the blade and extends along an inlet wind direction.

 The connection point of the third reinforcing rib to the hub is located at 3/5 to 4/5 of the projection width of the blade.

 The hub is provided with a plurality of circular holes in the thickness direction, and the circular holes are adapted to receive a balance adjusting steel ball.

 The pallet is a one-shot stretch structure, the edges of which are injection molded with the hub. The pallet is a flat plate structure whose edges are injection molded with the hub.

 Each of the blades includes a body, a root and an end, and the body is equally divided into five sections to form a total of six sections, from a section near the root to a section near the end, a string and a horizontal line of each section The angles are: 40. 5 degrees - 42. 5 degrees, 39. 5 degrees - 41. 5 degrees, 37. 9 degrees - 39. 9 degrees, 36. 3 degrees - 38. 3 degrees, 34. 9 degrees -36. 9 degrees, 33. 8 degrees - 36 degrees.

 0毫米。 The height of the first rib, the second rib and the third rib is 1. 5mm_5. 0mm.

The utility model provides an energy-efficient and cost-reducing fan according to the present invention, which has the following advantages compared with the prior art: First, the utility model has the root portion of the windward and leeward faces of the blade The ribs are not arranged, so that the strength of the blade root is increased, so that the root of the blade is not easily broken, and the service life of the blade is improved. Secondly, the adjacent blades of the present invention are connected by a curved connecting portion. Then, it is connected with the hub together, so that the connection strength between the blade and the hub is increased, and the connecting portion is curved, thereby reducing the influence on the air inlet; again, the utility model is provided with a plurality of circular holes on the hub, according to the adjusting blade For the balance, the steel balls are placed in the round holes at different positions, so that the balance adjustment can be achieved. The balance can be adjusted because the steel balls of the standard parts can be used at the lowest cost. Because the steel balls are standard parts, the cost is the lowest, and the balance can be used at one time. Place a few steel balls for one-time press-fit, because the hard extrusion will not make the steel balls jump out. Compared with other traditional adjustment balances, the balance block, insert, rivet, filature, drilling, etc. are inefficient, and some are non-standard. Some, the purchase volume is small and the cost is high, and it cannot be pressed at one time. DRAWINGS

 Figure 1 is a front view of the utility model.

 Figure 2 is a plan view of the present invention.

 Figure 3 is a rear elevational view of the present invention.

 Figure 4 is a right side view of the present invention.

 Figure 5 is a front perspective view of the present invention.

 Figure 6 is a perspective view of the reverse side of the present invention.

 Figure 7 is a cross-sectional view taken along line A-A of Figure 3.

 Figure 8 is a cross-sectional view taken along line B-B of Figure 3.

 Figure 9 is a cross-sectional view taken along line C-C of Figure 3.

 Figure 10 is a cross-sectional view taken along line D-D of Figure 3.

 Figure 11 is a cross-sectional view taken along line E-E of Figure 3.

 Figure 12 is a cross-sectional view taken along line F-F of Figure 3.

 Figure 13 is a cross-sectional view taken along line G-G of Figure 1.

Figure 14 is a front elevational view of another embodiment of the present invention. Figure 15 is a cross-sectional view taken along line HH of Figure 14;

 detailed description

 Referring to FIG. 1 to FIG. 6 , in an embodiment of the utility model, an efficient energy-saving fan is provided, comprising a pallet 1 , a hub 2 connected to the pallet 1 and a plurality of hubs from the hub 2 curved-shaped vanes 3 extending radially outward, the roots 31 adjacent to the vanes 3 are joined together by a curved connecting portion 32, the connecting portion 32 being moved from the trailing edge 33 of the preceding vane to the rear vane The leading edge 34 extends in the direction of the windward surface (concave surface) 35 of each of the blades 3 from the corner 33 of the trailing edge 33 to the hub 2 is formed with a first reinforcing rib 41, and the leeward of each of the blades 3 A second rib 42 is formed on the face (convex surface) 36 from the corner 341 of the leading edge 34 to the hub 2, and the leeward side (convex surface) 36 of each of the blades 3 is formed from the hub 2 toward the trailing edge 33. There is a third rib 43. The windward surface 35 is a concave surface of the blade 3, and the leeward surface 36 is a convex surface of the blade 3.

 The pallet 1 of the present invention is generally made of a metal material for connection with a drive mechanism, and thus the pallet 1 is provided with a plurality of fixing holes for mounting thereon. The hub 2 and the vane 3 are integrally formed, and the pallet 1 and the hub 2 are generally injection molded together during manufacture. The thickness of the hub 2 in the present invention is smaller than the width of the blade, thereby facilitating the connection of the pallet 1 to the drive mechanism. Since the thickness of the hub 2 is smaller than the width of the blade, when the root 31 of the blade 3 is coupled to the hub, the root portion 31 needs to be changed in shape to suit the thickness of the hub 2. However, when the shape is changed, the connection strength between the blade 3 and the hub 2 is lowered. In order to improve the connection strength of the root portion 31 of the blade 3, the root portion 31 of the adjacent blade 3 is connected by a curved connecting portion, so that the respective blades 3 are integrally formed, and the root portion 31 is also enlarged. The joint area of the hub 2 increases the joint strength.

The blade 3 of the present invention includes a body 38, a root portion 31 and an end portion 39. The body 38 forms a corner with the root portion 31 at the interface such that the trailing edge 33 of the blade 3 passes through the outer edge 321 of the connecting portion 32 and the adjacent blade 3 The leading edges 34 are connected together. The orthographic projections of the three parts connected together are approximately U-shaped or approximately V-shaped. The utility model increases the strength of the root portion 31 of each blade 3 by providing reinforcing ribs on the root portion 31 of each blade 3, so that the blade 3 is not easily broken, and the service life of the blade is improved.

 Referring to FIGS. 1 and 5, in the above embodiment of the present invention, the first reinforcing rib 41 is coupled to the hub 2 along a trend of the trailing edge 33 of the blade 3 before the corner 331. . The first rib 41 is connected to the rear edge 33 of the body 38 of the blade 3, so that the first rib 41 and the trailing edge 33 form a unitary structure, and the first rib 41 is not only The strength of the blade 3 is increased, and the windward surface (concave surface) of the blade 3 is also better.

 Referring to Figures 3 and 6, in the above embodiment of the present invention, the second reinforcing rib 42 is coupled to the hub 2 along a trend of the leading edge 34 of the blade 3 before the corner 341. . It is meant that the second reinforcing rib 42 is connected to the leading edge 34 of the body 38 of the blade 3 such that the second reinforcing rib 42 and the leading edge 34 form an integral structure, and the second reinforcing rib 41 is not only The strength of the blade 3 is increased, and the leeward (convex) performance of the blade 3 is also improved.

 Referring to FIG. 3 and FIG. 6, in the above embodiment of the present invention, the connection point 21 of the third reinforcing rib 43 and the hub 2 is close to the leading edge 34 of the blade 3, and along the air inlet. The wind extends. The connection point 21 of the third rib 43 to the hub 2 is located at 3/5 to 4/5 of the projection width of the blade. This embodiment is 2/3. The third reinforcing rib 43 is formed on the leeward side (convex surface), and its course is substantially arranged along the air flow direction, and does not affect the air flow.

Referring to Figures 1 and 13, in the above embodiment of the present invention, the hub 2 is provided with a plurality of circular holes 22 in the thickness direction, and the circular holes 22 are adapted to receive the balance adjusting steel balls 23. The circular hole 22 is arranged along the hub 2, and the steel ball 23 is placed in the circular hole 22 at different positions according to the balance requirement, thereby solving the problem of balancing the fan in the production, and the steel ball of the standard part can be adjusted to have the lowest cost. Balance, because the steel ball is a standard part, the cost is the lowest, you can put a few steel balls according to the balance amount at one time, and carry out one-time press-fit, due to hard extrusion It does not make the steel ball jump out. It is less efficient than other traditional adjustment balances such as balance block, insert, rivet, filature, drilling, etc. Some are non-standard parts, some are small in purchase cost, and can not be pressed at one time. .

 Referring to FIG. 6 and FIG. 13, in the above embodiment of the present invention, the pallet 1 is a one-shot tensile structure, and the stretching depth can be arbitrarily adjusted according to installation requirements, and the edge thereof is injection molded with the hub. . By setting different stretching structures, the installation position can be adjusted without the need to redesign the blades to facilitate the machining of the blades.

 Referring to Fig. 3, in the above embodiment of the present invention, the body 38 of the blade 3 is equally divided into five sections to form six sections, from a section near the root to a section near the end, each The angle between the chord line and the horizontal line of the section is: 40. 5 degrees - 42. 5 degrees, 39. 5 degrees - 41. 5 degrees, 37. 9 degrees - 39. 9 degrees, 36. 3 degrees - 38. 3 Degree, 34. 9 degrees - 36. 9 degrees, 33. 8 degrees - 36 degrees. The six cross-sectional positions at this point are shown by the hatching in Fig. 3, and in this embodiment, from the A-A hatching to the F-F hatching. 5度为为3. 5度, b is 38.5 degrees, d is 37 degrees, e is 35. 5, the angle between the chord and the horizontal line is 41. 5 degrees, b is 30.5 degrees, d is 37 degrees, e is 35. 5 Degree, f is 34.5 degrees. Blades of this shape have better performance, resulting in the best flow, power and efficiency.

 5匪-5. 0匪 匪 . . . 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪 匪. This embodiment is 3. 5 mm. The height of the rib can better meet the needs of the blade strength, and can increase the strength of the blade 3, so that the blade 3 is not easily broken.

 Referring to Fig. 14 and Fig. 15, in another embodiment of the present invention, the pallet 1 is a flat plate structure whose edges are injection molded with the hub 2.

 The fan of the utility model can be a suction fan or an exhaust fan.

Claims

Claim  What is claimed is: 1. A high efficiency energy saving fan comprising a pallet, a hub coupled to the pallet, and a plurality of curved vanes extending radially outward from the hub, characterized by: adjacent The roots of the blades are connected by a curved connecting portion, and the connecting portion is formed by extending the trailing edge of the preceding blade toward the leading edge of the latter blade, and the windward surface of each of the blades is from the corner of the trailing edge to The hub is formed with a first reinforcing rib, and a rib surface of each of the blades is formed with a second reinforcing rib from a corner of the leading edge to the hub, and a leeward surface of each of the blades is from the hub to the trailing edge The direction is formed with a third reinforcing rib.  2. An energy efficient cost reducing fan according to claim 1 wherein: said first stiffener is coupled to said hub along a direction of the trailing edge of said blade prior to said corner.  An energy efficient fan-reducing fan according to claim 1, wherein: said second reinforcing rib is coupled to said hub along a direction before said leading edge of said blade at a corner.  An energy-efficient fan-reducing fan according to claim 1, wherein: the connection point of the third reinforcing rib and the hub is close to the leading edge of the blade and extends along the wind direction of the inlet. 5. The high efficiency energy saving fan according to claim 4, wherein: the connection point of the third reinforcing rib and the hub is located at 3/5 to 4/5 of the projection width of the blade. 6. The high-efficiency energy-saving cost reducing fan according to claim 1 or 2 or 3 or 4, wherein: the hub is provided with a plurality of circular holes in a thickness direction, and the circular holes are adapted to be placed in a balance adjustment Steel balls.  7. An energy efficient cost reducing fan according to claim 1 or 2 or 3 or 4, wherein: said pallet is a tensile structure, the edges of which are injection molded with said hub.  8. An energy efficient cost reducing fan according to claim 1 or 2 or 3 or 4, wherein: said pallet is of a flat plate structure, the edges of which are injection molded with said hub.  9. The high efficiency energy saving fan according to claim 1 or 2 or 3 or 4, wherein: each of said blades comprises a body, a root and an end, and said body is equidistantly divided into five segments. 5度至39. 5度-41. The angle between the chord line and the horizontal line of each section is: 40. 5 degrees - 42.5 degrees, 39. 5 degrees - 41. 5 degrees, 37. 9 degrees - 39. 9 degrees, 36. 3 degrees - 38. 3 degrees, 34. 9 degrees - 36. 9 degrees, 33. 8 degrees - 36 degrees.  5mm_5. The height of the height of the first rib, the second rib, and the third rib is 1. 5mm_5. 0mm.